Key mechanism for typewriting machines



April 27 1926.

L. RElscHl.

KEY KECHANISH FOR TYPEWRITING MACHINES 2 sheets-sheet 1 Filed April 20. 192.3

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prix 27 192s. 1,582,431 L. RESCHL KEY MECHANISM FOR 'IJYPEWRI'I'ING KAGHINBS Filed April,I 20, 1925 2 Sheets-Sheet 2 M 'www Patented Apr. 27, 19.26.

UNITED STATES' .PATENT OFFICE.lv

LUDWIG' BEISCHI.,` 0E N'UREMBERG, GERMANY, ASSIGNOR TO DING-WERKE, VORM.

GEBR. BIN'G A.G.', 0F NUREMBERG, GERMANY.

:KEY mncmmsm ron mnwmrme'mcnmns.

Applicationl illed April 20, 1923. Serial No. 633,499.

To all 'whom it may concern Be it known that I, LUDWIG REIsoHL, a citizen of the German Reich, `residing at Nuremberg, Germany, have invented certain 6 new and useful Improvements in Key Mechanism for Typewriting Machines. (for which an application for patent has been led in Germany on the 1st of September, 1922, and th ofFebruary, 1923), of which the following is a specification.

It has become known to use for the guiding of keyand intermediate' levers in typewritino machines U-shaped members bent from ieet iron which have slits. The key levers are mounted on an axle which extends between the arms Sof the U-shaped member. According to this invention this axle is mounted in several bearing plates or cheeks which are fixed at convenient distances apart, on the web of the U-shaped member in order to avoid vibrations of the axle as much as possible. The U-shaped member is further. made so large that the ,widely spacedarms form perfect guides 4for the key levers. Y v

The U-shaped member for the mounting of the key levers and of the ke mechanism frames can be manufactured yV unskilled workmen so that the can be easily inserted as l a finished whole etween the side walls v of the frame of the typewriting machine.

' In the drawings one form of construction for a ke lever support is shown by .wayiOf exam e. f Figs. 1 an 2 show respectively in cross section and plan view one embodiment the invention.

In the embodiment of the invention shownl in Fig. 1 and 2 the key levers v1 of the lower group of keys are pivotally mounted on an axle 2, those of the middle A.

group 'of keys on an axle 3 and those of the third group of keys on an axle 4. The axles 2, 3 and 4 are fixed in bearing cheeks 5 riveted on the web plate of a sheet metal member 6 of U-shaped cross section. In the bearing cheeks 5 an axle 7 is further of .member of U-shaped cross section, the two fixed which is designed for-'the mounting of the shifting, spacingand like key levers.

. The two arms 8 and 9 of the U-shaped sheet -50 Vhooked onv a rod 13 extending above the web plate of the sheet metal member 6. By means of two lateral flanges 14 the entire 60 key board mechanism is connected with the side walls 15 of the frame of the typewriting machine. The pusher rods 16 for the type levers 17; are hingedly connected with the rear ends of the key levers 1 .said type 05 levers being mounted on the curved axle 18 of a type lever segment 19 and guided by means of a rearwardly directed extension 2O in slits 21 of the segment 19. The ratios of transmission of the key levers are selected so that the stroke of the key is approximately the same for each group of keys,Y

This mounting and guiding of the keyand intermediate levers in U-shaped sheet metal members is s ecially adapted, as all the parts are made y stamping, for cheap but accurate manufacture on a large scale particularly as no milling work is required `andias the arts can be put together by unskilled wor en. 80

I claim x A key lever support for typewriting machines .comprising only one single shcetzmetal arms of which are spaced widely and'have 85 longitudinal slits for guiding the key levers,

and bearing cheeks for the axle of the key levers onl the web plate of said U-shaped ,membelg said bearing cheeks'fixed at convenient distances apart between the-arms of the U-shaped member.

In testimony 'whereof I aflix my signature. LUDWIG REIISICHL. 

